Manual class transform
This commit is contained in:
Tim Schaub
+197
-205
@@ -19,74 +19,227 @@ import {shared as iconImageCache} from '../style/IconImageCache.js';
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* @param {module:ol/color~Color} color Color.
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* @extends {module:ol/events/EventTarget}
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*/
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const IconImage = function(image, src, size, crossOrigin, imageState, color) {
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class IconImage {
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constructor(image, src, size, crossOrigin, imageState, color) {
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EventTarget.call(this);
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EventTarget.call(this);
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/**
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* @private
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* @type {HTMLImageElement|HTMLCanvasElement}
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*/
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this.hitDetectionImage_ = null;
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/**
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* @private
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* @type {HTMLImageElement|HTMLCanvasElement}
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*/
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this.hitDetectionImage_ = null;
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/**
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* @private
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* @type {HTMLImageElement|HTMLCanvasElement}
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*/
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this.image_ = !image ? new Image() : image;
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/**
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* @private
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* @type {HTMLImageElement|HTMLCanvasElement}
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*/
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this.image_ = !image ? new Image() : image;
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if (crossOrigin !== null) {
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this.image_.crossOrigin = crossOrigin;
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}
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/**
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* @private
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* @type {HTMLCanvasElement}
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*/
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this.canvas_ = color ?
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/** @type {HTMLCanvasElement} */ (document.createElement('CANVAS')) :
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null;
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/**
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* @private
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* @type {module:ol/color~Color}
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*/
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this.color_ = color;
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/**
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* @private
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* @type {Array.<module:ol/events~EventsKey>}
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*/
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this.imageListenerKeys_ = null;
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/**
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* @private
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* @type {module:ol/ImageState}
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*/
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this.imageState_ = imageState;
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/**
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* @private
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* @type {module:ol/size~Size}
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*/
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this.size_ = size;
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/**
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* @private
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* @type {string|undefined}
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*/
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this.src_ = src;
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/**
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* @private
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* @type {boolean}
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*/
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this.tainting_ = false;
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if (this.imageState_ == ImageState.LOADED) {
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this.determineTainting_();
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}
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if (crossOrigin !== null) {
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this.image_.crossOrigin = crossOrigin;
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}
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/**
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* @private
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* @type {HTMLCanvasElement}
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*/
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this.canvas_ = color ?
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/** @type {HTMLCanvasElement} */ (document.createElement('CANVAS')) :
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null;
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determineTainting_() {
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const context = createCanvasContext2D(1, 1);
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try {
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context.drawImage(this.image_, 0, 0);
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context.getImageData(0, 0, 1, 1);
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} catch (e) {
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this.tainting_ = true;
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}
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}
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/**
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* @private
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* @type {module:ol/color~Color}
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*/
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this.color_ = color;
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dispatchChangeEvent_() {
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this.dispatchEvent(EventType.CHANGE);
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}
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/**
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* @private
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* @type {Array.<module:ol/events~EventsKey>}
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*/
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this.imageListenerKeys_ = null;
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handleImageError_() {
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this.imageState_ = ImageState.ERROR;
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this.unlistenImage_();
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this.dispatchChangeEvent_();
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}
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/**
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* @private
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* @type {module:ol/ImageState}
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*/
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this.imageState_ = imageState;
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/**
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* @private
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* @type {module:ol/size~Size}
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*/
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this.size_ = size;
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/**
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* @private
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* @type {string|undefined}
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*/
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this.src_ = src;
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/**
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* @private
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* @type {boolean}
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*/
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this.tainting_ = false;
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if (this.imageState_ == ImageState.LOADED) {
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handleImageLoad_() {
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this.imageState_ = ImageState.LOADED;
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if (this.size_) {
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this.image_.width = this.size_[0];
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this.image_.height = this.size_[1];
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}
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this.size_ = [this.image_.width, this.image_.height];
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this.unlistenImage_();
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this.determineTainting_();
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this.replaceColor_();
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this.dispatchChangeEvent_();
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}
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};
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/**
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* @param {number} pixelRatio Pixel ratio.
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* @return {HTMLImageElement|HTMLCanvasElement} Image or Canvas element.
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*/
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getImage(pixelRatio) {
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return this.canvas_ ? this.canvas_ : this.image_;
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}
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/**
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* @return {module:ol/ImageState} Image state.
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*/
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getImageState() {
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return this.imageState_;
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}
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/**
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* @param {number} pixelRatio Pixel ratio.
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* @return {HTMLImageElement|HTMLCanvasElement} Image element.
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*/
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getHitDetectionImage(pixelRatio) {
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if (!this.hitDetectionImage_) {
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if (this.tainting_) {
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const width = this.size_[0];
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const height = this.size_[1];
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const context = createCanvasContext2D(width, height);
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context.fillRect(0, 0, width, height);
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this.hitDetectionImage_ = context.canvas;
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} else {
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this.hitDetectionImage_ = this.image_;
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}
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}
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return this.hitDetectionImage_;
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}
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/**
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* @return {module:ol/size~Size} Image size.
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*/
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getSize() {
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return this.size_;
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}
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/**
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* @return {string|undefined} Image src.
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*/
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getSrc() {
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return this.src_;
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}
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/**
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* Load not yet loaded URI.
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*/
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load() {
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if (this.imageState_ == ImageState.IDLE) {
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this.imageState_ = ImageState.LOADING;
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this.imageListenerKeys_ = [
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listenOnce(this.image_, EventType.ERROR,
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this.handleImageError_, this),
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listenOnce(this.image_, EventType.LOAD,
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this.handleImageLoad_, this)
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];
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try {
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this.image_.src = this.src_;
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} catch (e) {
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this.handleImageError_();
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}
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}
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}
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/**
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* @private
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*/
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replaceColor_() {
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if (this.tainting_ || this.color_ === null) {
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return;
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}
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this.canvas_.width = this.image_.width;
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this.canvas_.height = this.image_.height;
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const ctx = this.canvas_.getContext('2d');
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ctx.drawImage(this.image_, 0, 0);
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const imgData = ctx.getImageData(0, 0, this.image_.width, this.image_.height);
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const data = imgData.data;
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const r = this.color_[0] / 255.0;
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const g = this.color_[1] / 255.0;
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const b = this.color_[2] / 255.0;
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for (let i = 0, ii = data.length; i < ii; i += 4) {
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data[i] *= r;
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data[i + 1] *= g;
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data[i + 2] *= b;
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}
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ctx.putImageData(imgData, 0, 0);
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}
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/**
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* Discards event handlers which listen for load completion or errors.
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*
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* @private
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*/
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unlistenImage_() {
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this.imageListenerKeys_.forEach(unlistenByKey);
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this.imageListenerKeys_ = null;
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}
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}
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inherits(IconImage, EventTarget);
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@@ -110,165 +263,4 @@ export function get(image, src, size, crossOrigin, imageState, color) {
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}
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/**
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* @private
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*/
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IconImage.prototype.determineTainting_ = function() {
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const context = createCanvasContext2D(1, 1);
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try {
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context.drawImage(this.image_, 0, 0);
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context.getImageData(0, 0, 1, 1);
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} catch (e) {
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this.tainting_ = true;
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}
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};
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/**
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* @private
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*/
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IconImage.prototype.dispatchChangeEvent_ = function() {
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this.dispatchEvent(EventType.CHANGE);
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};
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/**
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* @private
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*/
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IconImage.prototype.handleImageError_ = function() {
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this.imageState_ = ImageState.ERROR;
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this.unlistenImage_();
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this.dispatchChangeEvent_();
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};
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/**
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* @private
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*/
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IconImage.prototype.handleImageLoad_ = function() {
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this.imageState_ = ImageState.LOADED;
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if (this.size_) {
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this.image_.width = this.size_[0];
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this.image_.height = this.size_[1];
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}
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this.size_ = [this.image_.width, this.image_.height];
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this.unlistenImage_();
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this.determineTainting_();
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this.replaceColor_();
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this.dispatchChangeEvent_();
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};
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/**
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* @param {number} pixelRatio Pixel ratio.
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* @return {HTMLImageElement|HTMLCanvasElement} Image or Canvas element.
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*/
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IconImage.prototype.getImage = function(pixelRatio) {
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return this.canvas_ ? this.canvas_ : this.image_;
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};
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/**
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* @return {module:ol/ImageState} Image state.
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*/
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IconImage.prototype.getImageState = function() {
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return this.imageState_;
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};
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/**
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* @param {number} pixelRatio Pixel ratio.
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* @return {HTMLImageElement|HTMLCanvasElement} Image element.
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*/
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IconImage.prototype.getHitDetectionImage = function(pixelRatio) {
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if (!this.hitDetectionImage_) {
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if (this.tainting_) {
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const width = this.size_[0];
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const height = this.size_[1];
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const context = createCanvasContext2D(width, height);
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context.fillRect(0, 0, width, height);
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this.hitDetectionImage_ = context.canvas;
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} else {
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this.hitDetectionImage_ = this.image_;
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}
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}
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return this.hitDetectionImage_;
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};
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/**
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* @return {module:ol/size~Size} Image size.
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*/
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IconImage.prototype.getSize = function() {
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return this.size_;
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};
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/**
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* @return {string|undefined} Image src.
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*/
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IconImage.prototype.getSrc = function() {
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return this.src_;
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};
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/**
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* Load not yet loaded URI.
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*/
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IconImage.prototype.load = function() {
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if (this.imageState_ == ImageState.IDLE) {
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this.imageState_ = ImageState.LOADING;
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this.imageListenerKeys_ = [
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listenOnce(this.image_, EventType.ERROR,
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this.handleImageError_, this),
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listenOnce(this.image_, EventType.LOAD,
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this.handleImageLoad_, this)
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];
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try {
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this.image_.src = this.src_;
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} catch (e) {
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this.handleImageError_();
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}
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}
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};
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/**
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* @private
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*/
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IconImage.prototype.replaceColor_ = function() {
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if (this.tainting_ || this.color_ === null) {
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return;
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}
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this.canvas_.width = this.image_.width;
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this.canvas_.height = this.image_.height;
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const ctx = this.canvas_.getContext('2d');
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ctx.drawImage(this.image_, 0, 0);
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const imgData = ctx.getImageData(0, 0, this.image_.width, this.image_.height);
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const data = imgData.data;
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const r = this.color_[0] / 255.0;
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const g = this.color_[1] / 255.0;
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const b = this.color_[2] / 255.0;
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for (let i = 0, ii = data.length; i < ii; i += 4) {
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data[i] *= r;
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data[i + 1] *= g;
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data[i + 2] *= b;
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}
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ctx.putImageData(imgData, 0, 0);
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};
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/**
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* Discards event handlers which listen for load completion or errors.
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*
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* @private
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*/
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IconImage.prototype.unlistenImage_ = function() {
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this.imageListenerKeys_.forEach(unlistenByKey);
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this.imageListenerKeys_ = null;
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};
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export default IconImage;
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Reference in New Issue
Block a user